The beautiful orange-yellow paired valves of a Banded Wedge Shell, Donax vittatus (Da Costa), lying like a butterfly on the beach at Rhossili Bay. It is one of the most common bivalved molluscs on this stretch of shore and there are lots of the empty shells of this type on the strand line. They exhibit a range of colours and sometimes the inside of the shell is tinted a wonderful purple.
Jessica's Nature Blog 
Yes, they are very beautiful, and as you say, they reminds of a butterfly. 🙂
LikeLike
I love these…didn’t know their name though. I remember seeing thousands of them at Rossknowlagh in Donegal….as you say, like butterflies. Beautiful.
LikeLike
Thank you, John.
LikeLiked by 1 person
Thank you, Clare.
LikeLiked by 1 person